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Teplofizika vysokikh temperatur, 2008, Volume 46, Issue 3, Pages 435–442 (Mi tvt1080)  

Heat and Mass Transfer and Physical Gasdynamics

Special features of heat transfer under conditions of heat protection of high-temperature firing walls of components of modern power-generating units by way of tangential injection

V. I. Zalkind, S. S. Shchigel'

Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow
Abstract: In order to more precisely define the characteristics of heat transfer under conditions of protection of firing wall by means of tangential injection in the case of its high temperature (in particular, higher-thanadiabatic temperature) and to assess the effect of degree of turbulence of the incoming gas flow on heat transfer, a numerical investigation is performed under conditions of parameters typical of combustors of gas-turbine plants (GTP) with high parameters of the working medium. In so doing, the heat flux distribution, the profiles of turbulence intensity, the distribution of turbulent viscosity in the injection zone region under study, and other characteristics are determined. The low-Reynolds $k$$\epsilon$ model with wall functions and a new model of turbulent viscosity without wall functions are employed. It is found that a maximum of turbulent viscosity takes place behind the exit section of the injection slit with a shift to the main flow under conditions of tangential injection on an isothermal surface with a temperature much in excess of injection temperature (in a more general case, $T_w > T_{ad}$). This causes impairment of heat protection by injection, i. e., an increase in heat fluxes in the computational domain compared to heat fluxes calculated using integral methods.
Received: 11.10.2006
English version:
High Temperature, 2008, Volume 46, Issue 3, Pages 393–399
DOI: https://doi.org/10.1134/S0018151X08030164
Bibliographic databases:
Document Type: Article
UDC: 629.7.018.023.222
PACS: 44.20.+b; 47.27.te
Language: Russian
Citation: V. I. Zalkind, S. S. Shchigel', “Special features of heat transfer under conditions of heat protection of high-temperature firing walls of components of modern power-generating units by way of tangential injection”, TVT, 46:3 (2008), 435–442; High Temperature, 46:3 (2008), 393–399
Citation in format AMSBIB
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\paper Special features of heat transfer under conditions of heat protection of high-temperature firing walls of components of modern power-generating units by way of tangential injection
\jour TVT
\yr 2008
\vol 46
\issue 3
\pages 435--442
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\jour High Temperature
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\vol 46
\issue 3
\pages 393--399
\crossref{https://doi.org/10.1134/S0018151X08030164}
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